This project’s buyer is actually one of our suppliers who make shell for us. They had a epoxy powder coating line which used to run on nature gas. At that time, nature-gas was around 4.9 Yuan per cubicmeter and produce 8600 Kcal while off-peak power is 0.245 per KWH and produce 860 Kcal,
so the unit price for heat for them was cut half.
They did not pay in money and paid us with their products instead so I cannot tell the cost of this project or the investment return.
This is a typical project for a coating line where hot air is needed, we have some similar projects, and the investment return is depends on what energy source you are comparing with and how long does the factory runs every year.